Sewing machine



11 1927' D. w. MORLEY SEWING MACHINE,

led April 5. 1923 5 S eats-Sheet 1 1129.2 h

fivemr MTZ M /MM way Jan. 192

11 7 D. w. MORLEY SEWING MACHINE 5 Sheets-Sheet 2 Filed April 5. 1923 Jan. 11', 1927.

4 D. W; MORLEY SEWING MACHINE 5 Sheets-Sheet 5 illlll April 5. 192a Jan. 11 1927.

D. Y W. MORLEY SEWING MACHINE Filed April 5.

1923 5 Sheets-Sheet 4 1 1,614,012 Jan. 11 1927. D w. MORLEY SEWING MACHINE Filed April :5, 192: 5 Sheets-Sheet 5 Wifizess 1 fivenivr UNITED STATES PATENT OFFICE.

DENYS WARWICK MORLEY, OF VICTORIA, I'IONGKONG, ASSIGNOR TO UNITED SHOE MACHINERY CORPORATION, OF PATERSON, NEW JERSEY,.A CORPORATION OF NEW JERSEY.

SEWING MACHINE.

Application filed April 3, 1923, Serial No. 629,685, and in Great Britain April 5, 1922. I

The invention relates to boot or shoe or like sewing machines which embody a rotary work supporting horn (wherein. operates a looper) and a barbed needle and especially to machines such as described in U. S. ap-

plication N 0. 442,040, filed February 3, 1921, upon which Patent No. 1,521,288 issued, dated December 80, 1924, Gouldbourn & Ricks.

The principal objects of the invention are to adapt a machine as described in said specifications more readily to deal with shoes of widely differing thicknesses of bottom and with shoes requiring widely differing lengths of stitch. Another object of the invention is torender the mechanism of such a machine more robust and less liable to wear.

One feature of the invention is a rotary-' machine comprising means to vary the length of loop drawn out of the work as an incident of adjustment of the work-feed mechanism to sew stitches of different length.

Still a further feature of the invention is a needle-actuating mechanism for a rotaryhorn barbed needle chainstitch sewing machine the horn whereof controls the needle stroke which mechanism comprises a crank or like rotary actuator and a link-connection therefrom to the rest of the mechanism such that the point of connection of the link and rotary actuator on the one hand and the point of connection of the link and the driven mechanism on the other hand lie at the time the needle comes to the thread re-,

ceiving end of its stroke at opposite sides of the axis of the rotary actuator, thereby increasing the dwell at this end ofthe needle stroke and permitting the use of a looper rotating but twice for each needle reciprocation insteadof three times as formerly.

These and other objects and features of the invention will become more fully evident from the following description of constructions embodying the invention.

In the drawings Fig. .1 is aside elevation partly in section showing so much of the sewing machine of the above application as is necessary to illustrate the application of one form of the present invention thereto; Fig. 2 is a detailed side elevation of the needle actuating and controlling mechanism showing in full lines the position of the parts when the needle bar is fully raised and diagrammatically in dot-and-dash lines the position of the parts when a thicker piece of work is being operated upon; Fig. 3 shows diagrammatically in full lines the needle bar and actuating mechanism in fully lowered position and in dot-and-dash lines the position of these parts when operating on the same thicker piece of work; Fig. 4 is a partial view similar to Fig. 1 showing a second form of needle actuating and controllmg mechanism embodying the invention; Fig; 5

is a detailed sectional elevation showing a part of the connections through which the vertical movement of the horn in calipering the work controls the needle stroke; Fig. 6 is a front elevation partly in section of the mechanism shown in Fig. 5; Fig. 7 is a de tailed front elevation of the needle actuat ing and controlling mechanism of Figs. 4 and 6 showing in full and dot-and-dash lines the position of the parts at the upper end of the needle stroke in operating upon two different thicknesses of work and Fig. 8 shows diagrammatically in full and dot-and-dash lines the position of the parts at the lower end of the needle stroke when operating upon the different thicknesses of work.

The machine shown is provided with the rotary and vertically movable horn 2 carrying in its tip the rotary looper 4, a barbed needle 6 carried by a vertically reciprocating needle bar, a cast-off 8, a presser foot 10, and a feed point 12, all of which, with the exception of the looper and needle bar, are oper ated and controlled as in the machine shown and described in the application above referred .to. cam shaft 14 through a train of gearing and shafting similar to that of the machine of The looper is rotated from the the above application but the gearing is proportioned to give the looper two revolutions for each revolution of the cam shaft instead of three revolutions as heretofore horn is'raise'd and'lowered as in the machine of the above application through a treadle lever 16, the forward end of whichis connectedby links 18 with ayoke in which the horn rotates and the rear end of which is horntovary the position towhich the needle moves inboth directions according to the thickness of the work caliperedby the horn.

In the first construction (shown in Figs. 1, 2and 3of the drawings) the needle bar operating bell crank lever 28' has its depending arm'E-BO coupled by air-upwardly and rearwardly extending link 32' directly and by a'univ'ersal joint to the lower end of the connecting rod 84; which hangs from the ball shaped' crank pin 36, the arrangement being such that when the needle 6 is at the bottom of its stroke the'crank 36 is in its uppermost position (as shown'in Fig. 3) so that the slower rising and falling movement occursat the lower end of the needle stroke andnot atthe'up'p'e'r end as in the'previous construction and time is gained which permits of usin'ga looper' rotating but twice for each needle" reciprocation instead of the three toone looper necessary with the previous construction and somewhat subject to wear and tear. j

The pivotal connection of the-link 32' and rod 345 is pivotedto' one end of'a somewhat shorter link 38" extending forwardly, its other end being connected by a considerably longer and downwardly and rearwardly eX tending link lOto the horizontal horn con trolledle'ver 22 in the machine head and by a rearwardly'extending link 42 only slightly longer than itselfto a pivot point 4% on the framewhich is at all times some-what belowthe point 46 of interconnection of the threelinks38', 40 and 42- and lies between the highest and lowest points-of the throw of the lower end of the connecting rod 34c and somewhat below thelevel of the-pivot of the needle operating-bell crank lever 28.

In thesecond construction (shown in Figs. 4:; 6', 7- and 8) in which the links-and levers of the mechanism lie across the machine instead of. as in the first construction,

lengthwise of" the machine, the needle bar operating bell crank-lever 48has its arm 50' pivotally connected to one end of a link 52, the other end ofwhichis connected? by a link A to one armof alever 56 pivote'd at 58 to the machine frame The other arm of the lever: 56 is connectedjby a' link 60-to acrankarm fixed on the'driving. shaft 14. Also pivoted by a universal coupling to the connecting point 64; of the links 52 and 54 is a link 66 which at its lower end is connected at 68 by a universal coupling tothe horizontal horn controlled lever 22 which extends from front to rear of the machine and which in this construction is so formed that the pivotalpoint 68' is lowered asthehorn is lowered.

The whole arrangement in each construction'is such that if the point 46 011 6 l 'of in- I terconnection-of thethree links 38, 40 and e201 52; 5st and 66' is moved by the horn in response to increased thickness of the work and shown in dot and-dash linesin thedrawingsthe lowest position to which= illlGHlGCllZll'llSlil'Wlll move'the needle 1s=low'- ered substantially by the amount that the work is increased in thickness while the highest position to which the mechanisnr willmove the needle is raised by a smaller amountthan the work has increased in thickness but enough to draw loop of'a sutiiciently greater length above the work."

VV-ith diminishing thicknessof work a sim i--- lar result in diminishingthe needle-stroke curves; i. e-., the whole stroke is-reduced, butmore'at the "bottom than-at the-top end.-

The' length of loop drawn out above the work by theneedle should not only vary with the thicknessof the work but sho'uldalso vary" with the length of feedsince a shorter stitch requires lessthread and a" shorter loop. The length of loop drawn above the work obviously depends upon the height of-the lower surfaceof'the-presser' foot 10 and as it is im'po-rtantat all lengths of feed"that-thepresser"foot should-bails close to th sewing point as possible the: pres'ser foot is made adjustable to andifromthe sewing point on the lower end of: the" presser foet vertical bar '70 and advantage is taken of this-to insure coincident change" of the lengthofloopdrawn/abovethe-work (as the positionof thefoot is changed' fiorl diifei ent feeds) by providing for the purpose of the adjustment of the foot upon its bar a* rectilinear'tongue 72 on the bar 70 and a groove 7 4" on the presser foot which are in-' clined upwardly towards the sewing: point sufficiently to cause the foot to be: raised. by the amount that the loop length istobe cor respondingly shortened as the presser foot' is setnearer the sewing point for anyfp'ar-- ticula'r lengthof feed.

Theinvent ion having been thus described;-

what is claimed is 1. A sewing machine h'a-vin'g; in combina tion, a needle,-needle-actuating mechanismya work support, the vertical position of which varies with changes in the thickness of the work, and means acting automatically to control the needle actuating mechanism to vary the position to which the needle 1s moved in both directions according to the changes of work thickness.

2. A sewing machine having, in combination, a needle, a work support movable to caliper the work, and needle actuating mechanism controlled from the work support to project the needle a uniform distance through varying thicknesses 0-1": work and to draw a loop which varies in length from the face of the work as the work thickness varies.

3. A sewing machine having, in combination, a needle, a rotary work supporting horn movable to caliper the work, and needle actuating mechanism through which the horn by its movement according to changes of work thickness automatically varies the position to which the needle moves in both directions.

4. A sewing machine having, in combination, a needle, a work supporting horn movable to caliper the work, and needle actuating mechanism controlled by the position of the horn to project the needle a uniform distance into the horn and to draw above the upper face of the work a length of loop varying as the work thickness varies.

5. A sewing machine having, in combination, a needle, a work supporting horn movable to caliper the work, and needle actuating mechanism controlled by the position of the horn to vary both the upper and lower limits of the needle stroke.

6. A sewing machine having, in combination, a needle, a work supporting horn movable to caliper the-work, and needle actuating mechanism controlled by the position of the horn to vary the movement of the needle at the lower end of its stroke an amount equal to the variation in the work thickness and at the upper end of its stroke a less amount.

7. A sewing machine having, in combination, a needle, mechanism for actuating the needle comprising a series of relatively movable parts to maintain the needle under positive control throughout its stroke, a presser foot, a work support movable toward and from the presser foot, and a connection between the work support and needle actuating mechanism acting to vary both the needle penetrating stroke and the loop drawing stroke upon a change in the position of the work support.

8. A sewing machine having, in combination, a needle, mechanism for actuating the needle comprising pivotally connected links movable about different centers, one of which centers is on one side of the other at one limit of the needle stroke, and on the opposite side of the other at the other limit of the needle stroke, a presser foot, a work support, and a connection acting upon a change in the relative positions of the presser foot and work support to swing the pivotal connection of said links about one of said centers to increase or diminish the movement of the needle at both ends of its stroke.

9. A sewing machine having, in combination, a needle, mechanism for actuating the needle comprising pivotally connected links movable about different centers, means for moving one center about the pivotal connection of the links from one side to the.

other of the other center in moving the needle from one limit of its stroke to the other, and means for calipering the work connected to swing the pivotal connections of the link about the first center to vary the limit of the needle movement at both ends of its stroke.

10. A sewing machine having, in combination, a needle, mechanism for actuating the needle comprising an oscillating lever, two pivotally connected links, a pivotal connection between one of said links and the lever, connections between the other link and the needle, and work calipering means connected to swing the pivotal connections of the links about the pivotal connection of the oscillating lever to vary the limit of the needle movement at both ends of its stroke.

11. A sewing machine having, in combination, a barbed needle mounted to move during each stroke to a thread receiving position, a work supporting horn, needle actuat-- ing mechanism comprising a crank, a link connection having its point of connection with the crank and its point of connection with the rest of the mechanism on opposite sides of the axis of the crank when the needle is at the thread receiving end ofits stroke, and a rotary looper in the horn which makes two revolutions for eachreciprocation of the needle.

12. A sewing machine having, in combination, a barbed needle mounted to move during each stroke to a thread receiving .position, a work supporting horn movable to caliper the work, needle actuating mechanism controlled by the horn and comprising a crank, a link connection having its point of connection with the crank and its point of connection with the rest of the mechanism on opposite sides of the axis of the crank when the needle is at the thread receiving end of its stroke, and a rotary looper in the horn which makes two revolutions for each reciprocation of the needle.

DENYS WARl/VICK MORLEY. 

